Determination of antimony in soil by square wave anodic stripping voltammetry based on graphene/nano-aluminum oxide modified electrode
XU Jun-hui, HU Si-quan, LU Zhen, WANG Ya-zhen*
Hubei Key Laboratory of Industrial Fume & Dust Pollution Control, School of Chemistry and Environmental Engineering, Jianghan University, Wuhan 430056, China
Abstract：Antimony is a toxic metal element which is widely used as industry additive. It is one of suspected carcinogens and has toxic effect on human body and environmental biology. Therefore, the determination of antimony is the necessary requirement for environmental evaluation. A kind of graphene/nano-Al2O3 composite film modified electrode was prepared. The voltammetric stripping characteristics of Sb (III) on this modified electrode were discussed. The determination method of Sb (III) by square wave anodic stripping voltammetry was established. This composite film had loose and porous structure, and it exhibited large specific surface area and good electrical conductivity. The electrode had sensitive electrochemical response to Sb (III). Under the optimized experimental conditions, the striping peak currents were linear with the concentration of Sb (III) in the range of 1.0×10-7-1.0×10-5 mol/L. The limit of detection was 1×10-7 mol/L. The soil samples from surroundings of one factory were treated by microwave digestion. The content of antimony was determined by square wave anodic stripping voltammetry. The relative standard deviations (RSD, n=6) were between 3.1% and 3.9%. The measured content of antimony in soil sample was in range of 0.901-1.290mg/kg, which was consistent with those obtained by atomic absorption spectrometry.
徐俊晖, 胡思泉, 鲁珍, 王亚珍. 石墨烯/纳米氧化铝修饰电极方波阳极溶出伏安法测定土壤中锑[J]. 冶金分析, 2020, 40(6): 37-42.
XU Jun-hui, HU Si-quan, LU Zhen, WANG Ya-zhen. Determination of antimony in soil by square wave anodic stripping voltammetry based on graphene/nano-aluminum oxide modified electrode. , 2020, 40(6): 37-42.
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